Clegg has made clear that his price for joining the Conservatives in coalition is a change in our electoral system from FPTP to PR. There's only one problem. It's not a gift that's in Cameron's hands; any change in our electoral system will require a national referendum. The most that Cameron can offer is the referendum. Clegg also has that unfortunate Fedarist belief prevalent amongst EU officials that it's perfectly legitimate to use tax money to sway public opinion by unashamed biased propaganda, and no doubt will expect Cameron to use the State to bend public opinion towards a PR outcome.
The split between those who support PR and those who oppose it is essentially a simple one. Do you think that an MP should represent their constituency, or represent their party? PR is the choice of the political class, because it strengthens the role of the party in our political system. For that reason alone I unequivocally oppose it.
Clegg and the LibDems are also strongly supportive of State (read tax) funding of their party - so much easier than having the inconvenience of members. Cable's price for agreement with Labour on State funding was risibly narcissistic; a State limo and driver for the leader of the Libdems.
I have no doubt that Clegg will also demand of Cameron the support of the Conservatives for State funding of the main parties as the price of Coalition. If Cameron should sign up to this, he will have earned my undying hostility.